package com.t282.crm.config.shiro;

import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
import com.t282.crm.entity.Right;
import com.t282.crm.service.RoleService;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.codehaus.groovy.util.ListHashMap;
import org.crazycake.shiro.RedisCacheManager;
import org.crazycake.shiro.RedisManager;
import org.crazycake.shiro.RedisSessionDAO;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.annotation.Resource;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

@Configuration
public class ShiroConfig {
    //注入Redis参数，从application.properties获得
    @Value("${spring.redis.host}")
    private String host;
    @Value("${spring.redis.port}")
    private int port;
    /*@Value("${spring.redis.password}")
    private String password;*/
    @Value("${spring.redis.timeout}")
    private int timeout;

    @Resource
    private RoleService roleService;

    /*加密*/
    @Bean
    public HashedCredentialsMatcher hashedCredentialsMatcher(){
        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        //使用md5算法进行加密
        hashedCredentialsMatcher.setHashAlgorithmName("md5");
        //设置散列此次数,意为加密几次
        hashedCredentialsMatcher.setHashIterations(2);
        return hashedCredentialsMatcher;
    }
    /**
     * 开启Shiro注解
     * 需借助SpringAOP扫描使用Shiro注解的类，并在必要时进行安全逻辑验证
     * 配置以下两个bean（DefaultAdvisorAutoProxyCreator和AuthorizationAttributeSourceAdvisor）
     */
    @Bean
    public DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator(){
        DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        advisorAutoProxyCreator.setProxyTargetClass(true);
        return advisorAutoProxyCreator;
    }

    /**
     * 开启aop注解支持
     */
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager){
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }

    public RedisManager redisManager(){
        RedisManager redisManager = new RedisManager();
        redisManager.setHost(host);
        redisManager.setPort(port);
        /*redisManager.setPassword(password);*/
        redisManager.setTimeout(timeout);
        return redisManager;
    }

    public RedisCacheManager cacheManager(){
        RedisCacheManager cacheManager = new RedisCacheManager();
        cacheManager.setRedisManager(redisManager());
        //缓存名称
        cacheManager.setPrincipalIdFieldName("usrName");
        //缓存有效时间
        cacheManager.setExpire(1800);
        return cacheManager;
    }

    //会话操作
    public RedisSessionDAO redisSessionDAO(){
        RedisSessionDAO sessionDAO = new RedisSessionDAO();
        sessionDAO.setRedisManager(redisManager());
        return sessionDAO;
    }

    //会话管理
    public DefaultWebSessionManager sessionManager(){
        DefaultWebSessionManager sessionManager = new DefaultWebSessionManager();
        sessionManager.setSessionDAO(redisSessionDAO());
        return sessionManager;
    }

    @Bean
    public MyShiroRealm myShiroRealm(){ //自定义Realm
        MyShiroRealm shiroRealm = new MyShiroRealm();

        //设置启用缓存，并设置缓存名称
        shiroRealm.setCachingEnabled(true);
        shiroRealm.setAuthorizationCachingEnabled(true);
        shiroRealm.setAuthorizationCacheName("authorizationCache");

        //设置凭证（密码）匹配器
        shiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());

        return shiroRealm;
    }

    @Bean
    public SecurityManager securityManager(){   //安全管理器SecurityManager
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        //注入Realm
        securityManager.setRealm(myShiroRealm());

        //注入缓存管理器
        securityManager.setCacheManager(cacheManager());
        //注入会话管理
        securityManager.setSessionManager(sessionManager());

        return securityManager;
    }

    @Bean
    public ShiroFilterFactoryBean shiroFilterFactory(SecurityManager securityManager){  //Shiro过滤器，权限认证
        ShiroFilterFactoryBean shiroFilterFactory = new ShiroFilterFactoryBean();
        //注入SecurityManager
        shiroFilterFactory.setSecurityManager(securityManager);

        //权限验证：使用Filter控制资源（URL）的访问
        shiroFilterFactory.setLoginUrl("/login");
        shiroFilterFactory.setSuccessUrl("/main");
        shiroFilterFactory.setUnauthorizedUrl("/403");  //没有权限跳转403页面
        Map<String,String> filterChainDefinitionMap = new LinkedHashMap<String,String>();   //必须使用LinkedHashMap（有序集合）
        //配置可以匿名访问的资源（URL）：静态资源
        filterChainDefinitionMap.put("/css/**","anon");
        filterChainDefinitionMap.put("/fonts/**","anon");
        filterChainDefinitionMap.put("/images/**","anon");
        filterChainDefinitionMap.put("/js/**","anon");
        filterChainDefinitionMap.put("/localcss/**","anon");
        filterChainDefinitionMap.put("/localjs/**","anon");

        filterChainDefinitionMap.put("/user/doLogin","anon");
        filterChainDefinitionMap.put("/user/logOut","logout");   //注销过滤器，自动注销

        //配置需要特定权限才能访问的资源（URL）
        //静态授权：包括全部需要特定权限才能访问的资源（URL）
        //filterChainDefinitionMap.put("/user/list","perms[用户列表]");
        //filterChainDefinitionMap.put("/user/add","perms[用户添加]");
        //filterChainDefinitionMap.put("/user/edit","perms[用户编辑]");
        //filterChainDefinitionMap.put("/user/del","perms[用户删除]");

        //动态授权
        List<Right> rights = roleService.findAllRights();
        for (Right right : rights) {
            if(right.getRightUrl() != null && !right.getRightUrl().trim().equals("")){
                filterChainDefinitionMap.put(right.getRightUrl(),"perms["+right.getRightCode()+"]");
            }
        }

        //配置认证访问：其他资源（URL）必须认证通过才能访问
        filterChainDefinitionMap.put("/**","authc");    //必须放在过滤器链的最后面

        shiroFilterFactory.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactory;
    }

    /*thymeleaf页面上可以使用shiro标签*/
    @Bean(name = "shiroDialect")
    public ShiroDialect shiroDialect(){
        return new ShiroDialect();
    }

}
